PubMed is a database maintained by the United States National Library of Medicine. Go to PubMed by clicking here.
PubMed was launched in 1996 and covers the entire database of MEDLINE together with life science journals and e-books. In it, you will find articles and books on the fields of life science and (bio)medical science from 1809 until now. PubMed also had a Thesaurus, which will help you with your searching by presenting MeSH (Medical Subject Headings) terms. Articles in PubMed are indexed by these MeSH terms.
tutorials
For more information and the user guides on PubMed, see here, or watch this video.